波浪在珊瑚礁地形上破碎特性试验研究  

Experimental researches on wave propagation characteristics on reefs terrain

作　　者：柳淑学[1] 刘宁[1] 李金宣[1] 方亚冰[1] 刘思[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《海洋工程》2015年第2期42-49,共8页The Ocean Engineering

基　　金：国家重点基础研究发展计划973资助项目(2013CB036101;2011CB013703);国家自然科学基金创新研究群体基金资助项目(51221961)

摘　　要：对波浪在珊瑚礁地形上的传播特性进行了物理试验研究,将珊瑚礁地形简化为坡度为1∶5的陡坡(向海坡)加较长水平礁坪段的地形,对规则波和不规则波在该地形条件下的波浪破碎及波高沿程衰减进行了研究。结果表明,波高较小时,波浪破碎发生在礁坪上,但随着入射波高的增大,破碎位置逐渐向来浪方向移动,直至在向海坡段破碎。对于在礁坪上破碎的波浪,相对水深db/L0一定的条件下,破碎波高与入射波陡H0/L0相关,且变化趋势受相对水深db/L0的影响。同时给出了该地形条件下波浪破碎指标以及礁坪段破碎后沿程波高的计算公式。The physical modelling experiment on the wave propagation characteristics on the reef terrain was conducted. The wave propagation process,wave breaking criteria,and the wave height changes after wave breaking were analyzed. The results show that if water depth and wave period are determined,the position of wave breaking will move forward on the reef flat with the wave height increasing until wave breaking occurs on the slope. Once the db/ L0 is determined,the Hbhas a linear relationship with H0/ L0 and the change is affected by db/ L0. Compared with the previous several wave breaking criteria,the form and parameters of wave breaking criterion formula are given based on the test data. The formula which is used to describe the wave height changes after breaking is also given based on test data.

关 键 词：珊瑚礁地形 波浪破碎 破碎后波高衰减 

分 类 号：TV149.2[水利工程—水力学及河流动力学]